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| Mechanical Behavior | Standard Values |
|---|---|
Density |
2.2 g/cm³ |
Compressive strength |
1100 MPa |
Flexural strength |
67 MPa |
Poisson's ratio |
0.14 ~ 0.17 |
Young's modulus |
72,000 MPa |
Modulus of rigidity |
31,000 MPa |
Mohs hardness |
5.5 ~ 6.5 |
Transformation point |
1280 °C |
Softening Point |
1780 °C |
Annealing point |
1250 °C |
Specific heat (20 ~ 350 °C) |
670 J/kg·°C |
Thermal conductivity (20 °C) |
1.4 W/m·°C |
Index of refraction |
1.4585 |
Low thermal expansion coefficient |
5.5 × 10⁻⁷ cm/cm·°C |
Thermal processing temperature |
1750 ~ 2050 °C |
Short-term use temperature |
1300 °C |
Long-term use temperature |
1100 °C |
Material |
Silicon Dioxide (Natural Quartz) |
Color |
Transparent or Colorless |
Surface |
No Air Bubble, No Line |
Strain |
1270 °C Fused Quartz Glass Brick |
PPM grade |
Controlled 10 / 20 / 100 PPM |
Shape |
Circle |
Thickness |
2 MM – 20 MM |
Fused quartz glass supports a long-term use temperature of up to 1100 °C and a short-term use temperature of up to 1300 °C. Its thermal processing temperature ranges from 1750 °C to 2050 °C, making it one of the most thermally stable optical and industrial glass materials available.
Fused quartz glass is made from Silicon Dioxide (SiO₂) sourced from Natural Quartz. It is transparent or colorless, with a surface that is free of air bubbles and lines, ensuring exceptional optical clarity and structural integrity.
The quartz glass is available in a circular shape with thickness options ranging from 2 mm to 20 mm. Custom dimensions can often be arranged based on specific application requirements.
PPM (Parts Per Million) grade refers to the level of metallic impurities present in the quartz glass. Lower PPM values indicate higher purity. Available grades include 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate purity level for semiconductor, optical, or high-temperature industrial applications.
The low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C is an intrinsic property of fused silica (SiO₂). This extremely low expansion rate means the material undergoes minimal dimensional change under heat, making it ideal for precision optical systems, laboratory equipment, and high-temperature environments where dimensional stability is critical.
Fused quartz glass has a compressive strength of 1100 MPa, which is exceptionally high for a glass material. Combined with a Young's modulus of 72,000 MPa and a Mohs hardness of 5.5 to 6.5, it offers strong mechanical resistance to deformation and surface scratching, outperforming many standard glass types in demanding industrial applications.
